单击地图上的区域时，D3 将数据附加到 div
D3 append data to div when region on map is clicked
我是 D3 的新手，所以请原谅我的理解有限。不过，我很高兴收到任何反馈。
我的目标是根据 json 文件绘制地图，当用户单击特定区域时，存储在 json 中的该区域的信息将被带走以更新div 元素。
绘制地图效果很好，但我真的找不到在单击地图上的某个区域时动态更新 div“信息框”元素的方法。
这是我的代码（或 codepen）：
这是HTML:
<div id="default3" style="background-color:white;" >
<div id="infobox">
<p><span id="gname"></span> Wählen Sie eine Gemeinde aus: </p>
<p><span id="areaha"></span> </p>
</div>
</div>
<div id="zuständig">
Testtext <br>
Test phone number <a href="tel:+41 123456789">Tel: +41 123456789</a>, <a href="mailto:test.tester@nothing.ch">E-Mail: test.tester@nothing.ch</a>
</div>
这是Javascript:
var w = 500;
var h = 500;
var svg = d3.select("div#default3").append("svg").attr("preserveAspectRatio", "xMinYMin meet")
.attr("viewBox", "0 0 " + w + " " + h).style("background","#c9e8fd")
.classed("svg-content", true);
var svg2 = d3.select("div#default3").append("svg")
var projection = d3.geoMercator().translate([w/2, h/2]).scale(50000).center([8.548589899,47.15309567]);
var path = d3.geoPath().projection(projection);
var map = {"type":"FeatureCollection","features":[
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{"type":"Feature","id":"9002","properties":{"name": "Aegerisee", "BZNR": 0, "KTNR": 0, "GRNR": 0, "AREA_HA": 0, "X_MIN": 687237, "X_MAX": 691411, "Y_MIN": 217452, "Y_MAX": 221450, "X_CNTR": 689500, "Y_CNTR": 219600, "Z_MIN": 0, "Z_MAX": 0, "Z_AVG": 0, "Z_MED": 0, "Z_CNTR": 0, "E_MIN": 2687237, "E_MAX": 2691411, "N_MIN": 1217452, "N_MAX": 1221450, "E_CNTR": 2689500, "N_CNTR": 1219600, "SEE_HA": 728 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ 8.588369168161423, 47.137650996437166 ], [ 8.598008216011742, 47.136915343575595 ], [ 8.604675188818925, 47.137448096867864 ], [ 8.613000362263703, 47.13205412806856 ], [ 8.620017891442906, 47.133433133029662 ], [ 8.630147692919847, 47.129705018570426 ], [ 8.643331230447103, 47.114354705967344 ], [ 8.640093095917065, 47.103580246542862 ], [ 8.63065702169243, 47.102264682808006 ], [ 8.624319217527335, 47.10756942313666 ], [ 8.624364460226396, 47.113034051695351 ], [ 8.621484448655124, 47.114195457109091 ], [ 8.601317601276373, 47.121115694378538 ], [ 8.591395507796173, 47.122722255692032 ], [ 8.595680723183504, 47.128362467567882 ], [ 8.593694489526422, 47.133476782538082 ], [ 8.588369168161423, 47.137650996437166 ] ] ] ] } }
]};
Promise.all([map]).then(function(values){
svg.append('rect')
.attr('width', w)
.attr('height', h)
.attr('fill', 'white')
svg.selectAll("path")
.append("g")
.data(values[0].features)
.enter()
.append("path")
.attr("d", path)
.style("stroke", "black")
.attr("opacity",function(d) {
if (d.id == 1702 | d.id == 1703 | d.id == 1704 | d.id==1705 | d.id==1708 | d.id==1710 | d.id == 1701 | d.id==1706 | d.id==1709) {
return ".5"
} else{
return "1"
}
})
.style("fill", function(d) {
if (d.id == 1702 | d.id == 1703) {
return "#529C07";//grün
} else if (d.id == 1711 | d.id==1707) {
return "#F28C08 ";//orange
}else if (d.id == 1704 | d.id==1705 | d.id==1708 | d.id==1710) {
return "#FFF700";//gelb
}else if (d.id == 1701 | d.id==1706 | d.id==1709) {
return "#0022FF";//blau
} else if (d.id == 9001 | d.id==9002 ) {
return "#DEDEDE";//grau für seen
} else{
return "white"
}
})
.on('mouseover', function (d, i) {
d3.select(this).transition()
.duration('50')
.attr('opacity', '1')})
.on('mouseout', function (d, i) {
if (d.id != 9001 | d.id!=9002){
d3.select(this).transition()
.duration('50')
.attr('opacity', '.5')}})
.on("mousemove", function(d,i){
d3.select(this)
.append("svg:title")
.text(function (d) { return d.properties.name })
})
.on("click", function(d,i) {
d3.select("#infobox")
.select("#gname")
.text(function (d) { return "Ausgewählte Gemeinde: " + d.properties.name});
d3.select("#infobox")
.select("#areaha")
.text(function (d) { return "Hektar: " + d.properties.AREA_HA});
})
;
});
感谢您的支持。
您的 .text 函数访问了错误的变量。您需要从 i 读取数据，而不是 d:
.on("click", function(d,i) {
d3.select("#infobox")
.select("#gname")
.text(function (d) { return "Ausgewählte Gemeinde: " + i.properties.name});
d3.select("#infobox")
.select("#areaha")
.text(function (d) { return "Hektar: " + i.properties.AREA_HA});
})
.on("click" 处理程序接收两个输入，(d,i)。第一个提供发生的事件，以及鼠标指针坐标等属性。第二个提供被点击的数据元素，即数据数组中的对象之一。
Note that there are many parts of this code that you should improve. For example:
- You shouldn't need to select "#infobox" multiple times. Better store the selection and work on it from there.
- The inner handler of the
.text function receives an input d, which overshadows the outer variable d of the .on("click" handler. Better rename that inner variable.
- Drawing and reacting are mixed up too much here. You should separate the steps of adding elements, styling them, and reacting to them. This kind of mixed up looks short and easy, but gets extremely nasty when you need to add things later on, esp. adding/removing/shifting elements.
- The idea of data-driven documents (= "D3") is that properties within the data determine what they will look like. In your case, there should be a property that determines the color coding - you shouldn't check for individual IDs there.
我是 D3 的新手，所以请原谅我的理解有限。不过，我很高兴收到任何反馈。
我的目标是根据 json 文件绘制地图，当用户单击特定区域时，存储在 json 中的该区域的信息将被带走以更新div 元素。
绘制地图效果很好，但我真的找不到在单击地图上的某个区域时动态更新 div“信息框”元素的方法。
这是我的代码（或 codepen）：
这是HTML:
<div id="default3" style="background-color:white;" >
<div id="infobox">
<p><span id="gname"></span> Wählen Sie eine Gemeinde aus: </p>
<p><span id="areaha"></span> </p>
</div>
</div>
<div id="zuständig">
Testtext <br>
Test phone number <a href="tel:+41 123456789">Tel: +41 123456789</a>, <a href="mailto:test.tester@nothing.ch">E-Mail: test.tester@nothing.ch</a>
</div>
这是Javascript:
var w = 500;
var h = 500;
var svg = d3.select("div#default3").append("svg").attr("preserveAspectRatio", "xMinYMin meet")
.attr("viewBox", "0 0 " + w + " " + h).style("background","#c9e8fd")
.classed("svg-content", true);
var svg2 = d3.select("div#default3").append("svg")
var projection = d3.geoMercator().translate([w/2, h/2]).scale(50000).center([8.548589899,47.15309567]);
var path = d3.geoPath().projection(projection);
var map = {"type":"FeatureCollection","features":[
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{"type":"Feature","id":"9002","properties":{"name": "Aegerisee", "BZNR": 0, "KTNR": 0, "GRNR": 0, "AREA_HA": 0, "X_MIN": 687237, "X_MAX": 691411, "Y_MIN": 217452, "Y_MAX": 221450, "X_CNTR": 689500, "Y_CNTR": 219600, "Z_MIN": 0, "Z_MAX": 0, "Z_AVG": 0, "Z_MED": 0, "Z_CNTR": 0, "E_MIN": 2687237, "E_MAX": 2691411, "N_MIN": 1217452, "N_MAX": 1221450, "E_CNTR": 2689500, "N_CNTR": 1219600, "SEE_HA": 728 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ 8.588369168161423, 47.137650996437166 ], [ 8.598008216011742, 47.136915343575595 ], [ 8.604675188818925, 47.137448096867864 ], [ 8.613000362263703, 47.13205412806856 ], [ 8.620017891442906, 47.133433133029662 ], [ 8.630147692919847, 47.129705018570426 ], [ 8.643331230447103, 47.114354705967344 ], [ 8.640093095917065, 47.103580246542862 ], [ 8.63065702169243, 47.102264682808006 ], [ 8.624319217527335, 47.10756942313666 ], [ 8.624364460226396, 47.113034051695351 ], [ 8.621484448655124, 47.114195457109091 ], [ 8.601317601276373, 47.121115694378538 ], [ 8.591395507796173, 47.122722255692032 ], [ 8.595680723183504, 47.128362467567882 ], [ 8.593694489526422, 47.133476782538082 ], [ 8.588369168161423, 47.137650996437166 ] ] ] ] } }
]};
Promise.all([map]).then(function(values){
svg.append('rect')
.attr('width', w)
.attr('height', h)
.attr('fill', 'white')
svg.selectAll("path")
.append("g")
.data(values[0].features)
.enter()
.append("path")
.attr("d", path)
.style("stroke", "black")
.attr("opacity",function(d) {
if (d.id == 1702 | d.id == 1703 | d.id == 1704 | d.id==1705 | d.id==1708 | d.id==1710 | d.id == 1701 | d.id==1706 | d.id==1709) {
return ".5"
} else{
return "1"
}
})
.style("fill", function(d) {
if (d.id == 1702 | d.id == 1703) {
return "#529C07";//grün
} else if (d.id == 1711 | d.id==1707) {
return "#F28C08 ";//orange
}else if (d.id == 1704 | d.id==1705 | d.id==1708 | d.id==1710) {
return "#FFF700";//gelb
}else if (d.id == 1701 | d.id==1706 | d.id==1709) {
return "#0022FF";//blau
} else if (d.id == 9001 | d.id==9002 ) {
return "#DEDEDE";//grau für seen
} else{
return "white"
}
})
.on('mouseover', function (d, i) {
d3.select(this).transition()
.duration('50')
.attr('opacity', '1')})
.on('mouseout', function (d, i) {
if (d.id != 9001 | d.id!=9002){
d3.select(this).transition()
.duration('50')
.attr('opacity', '.5')}})
.on("mousemove", function(d,i){
d3.select(this)
.append("svg:title")
.text(function (d) { return d.properties.name })
})
.on("click", function(d,i) {
d3.select("#infobox")
.select("#gname")
.text(function (d) { return "Ausgewählte Gemeinde: " + d.properties.name});
d3.select("#infobox")
.select("#areaha")
.text(function (d) { return "Hektar: " + d.properties.AREA_HA});
})
;
});
感谢您的支持。
您的 .text 函数访问了错误的变量。您需要从 i 读取数据，而不是 d:
.on("click", function(d,i) {
d3.select("#infobox")
.select("#gname")
.text(function (d) { return "Ausgewählte Gemeinde: " + i.properties.name});
d3.select("#infobox")
.select("#areaha")
.text(function (d) { return "Hektar: " + i.properties.AREA_HA});
})
.on("click" 处理程序接收两个输入，(d,i)。第一个提供发生的事件，以及鼠标指针坐标等属性。第二个提供被点击的数据元素，即数据数组中的对象之一。
Note that there are many parts of this code that you should improve. For example:
- You shouldn't need to select "#infobox" multiple times. Better store the selection and work on it from there.
- The inner handler of the
.textfunction receives an inputd, which overshadows the outer variabledof the.on("click"handler. Better rename that inner variable.- Drawing and reacting are mixed up too much here. You should separate the steps of adding elements, styling them, and reacting to them. This kind of mixed up looks short and easy, but gets extremely nasty when you need to add things later on, esp. adding/removing/shifting elements.
- The idea of data-driven documents (= "D3") is that properties within the data determine what they will look like. In your case, there should be a property that determines the color coding - you shouldn't check for individual IDs there.